低温等离子体射流处理对硅橡胶材料性能的影响研究

Investigation on effect of low temperature plasma jet treatment on performance of silicone rubber material

为解决硅橡胶电缆表面印字污染问题,本文提出利用低温等离子体射流对硅橡胶进行表面处理。以交流电源激励针-环结构电极产生氩气等离子体射流,对不同移动速度下的硅橡胶电缆表面进行动态处理,系统研究处理速度对硅橡胶电缆憎水性、沿面耐压和击穿性能的影响,通过SEM和EDS检测硅橡胶表面物理形貌和化学成分变化。结果表明:射流静态处理会导致材料表面温度升高,而动态处理可以显著降低温升。处理后硅橡胶的水接触角和闪络电压均有小幅度下降。随着处理速度增大,硅橡胶的憎水性和电气绝缘性能逐渐恢复。5mm/s处理条件下,硅橡胶表面抗油墨粘接性显著提高。结合物化特性结果可知,等离子体射流处理后硅橡胶表面交联聚合程度提高,界面分子扩散运动受到阻碍,进而降低了硅橡胶表面自黏性能。

In order to solve the problem of printing contamination on the surface of silicone rubber cables,the application of low temperature plasma jet in surface treatment of silicone rubber was proposed in this paper.Ar plasma jet was generated with needle-ring structure electrode driven by AC power source,and the surface of silicone rubber cables was dynamically treated at different moving speeds.The influence of processing speed on the hydrophobicity,surface voltage,and breakdown strength of silicone rubber cable was systematically studied.The changes in surface physical morphology and chemical composition of silicone rubber were detected by SEM and EDS.The results show that static jet treatment can cause an increase of the material surface temperature,while dynamic treatment can significantly reduce the temperature rise.The water contact angle and flashover voltage of silicone rubber slightly decrease after treatment.With the increase of processing speeds,the hydrophobic and electrical insulation performance gradually recover.Under the speed of 5 mm/s,the anti-ink adhesion of silicone rubber surface is significantly improved.It can be concluded that the degree of cross-linking polymerization on the surface of silicone rubber increases after the plasma jet treatment,and the diffusion movement of interface molecules at the interface is hindered,which decrease the anti-ink adhesion of the silicone rubber surface.